Light sensitive diazotype material

ABSTRACT

DIAZOTYPE MATERIAL INCLUDES A LIGHT-SENSITIVE DIAZONIUM COMPOUND OF THE GENERAL FORMULA   1-(R1-N(-R2)-),2-R3,4-(X-N=N-),5-R4-BENZENE   WHEREIN R1 IS A LOWER ALKYL GROUP OR AN ARALKYL GROUP, R2 IS A LOWER ALKYL GROUP, OR R1 AND R2 TOGETHER FROM A HETEROCYCLIC RADICAL WITH THE NITROGEN ATOM; R3 IS HYDROGEN, A LOWER ALKOXY GROUP, OR A LOWER ALKOXY GROUP HAVING AT LEAST ONE FLUORINE ATOM ATTACHED TO THE CARBON IN A POSITION; R4 IS HALOGEN OR A LOW ALKOXY GROUP HAVING AT LEAST ONE FLUORINE ATTACHED TO THE CARBON IN A-POSITION; AND X IS THE ANION OF THE DIAZONIUM COMPOUND; AND WHEREIN ONLY ONE OF R3 AND R4 IS SAID FLUORINATED ALKOXY GROUP.

lwherein i. i I u a R isa lower alkyl group or an aralkyl group,

he e n U ited Saw Pew- 3,748,140 LIGHT-SENSITIVE DIAZOTYPE MATERIAL Hans-Dieter Frommeld and Herbert Rauhut, Wiesbaden- Biebrich, Germany, assignors to Keufiel & Esser Company, Morristown, NJ. No Drawing. Filed Sept. 4, 1969, Ser. No. 855,422 Claims priority, application Germany, Sept. 3, 1968, P 17 93 332.3 Int. Cl. C07c 113/04; G03c 1/54 U.S. Cl. 96-.-91 R v R is a lower alkyl group,"or

R ,and R together form a nitrogen atom;

R is hydrogen, a lower alkoxy group, or a lower alkoxy group having at least one fluorine atom attached to the .carbon in .a-position;

R is halogen or a low alkoxy group having at least one heterocyclic radical with. the

;fluorine attached to the carbon in a-position; and

X is the anion of the diazonium compound;

' BACKGROUND OF INVENTION the general formula g v Rand R istand for; unsubstituted orsubstituted alkyl, aralkyl, or cycloalkyl groups, or form an unsubstituted .-,or; substituted heterocyclie radical with theznitrogen atom; 1 v. v L N v R stands for hydrogen, an alkoxygroup, or a fiuorinated alkoxy group;

wherein only one of R and R is said fiuorinated speed. Therefore, they are preferably used for one-component diazotype materials.

Compounds according to the present invention which have a relatively low coupling speed, i.e. compounds in which R and R are lower alkyl groups, may also be used in two-component diazotype materials.

Apart from their higher coupling speed, the compounds according to the present invention are very similar in their properties to the compounds described in the above-noted reference. They possess a good light-sensitivity, which is particularly high in such compounds in which R; or R stands for a fiuorinated alkoxy group.

The compounds according to the present invention are new. They may be prepared analogously to known processes. The fiuorinated alkoxy groups may he introduced, e .g. by addition of fluorine-containing carbenes to phenols, by addition of phenolates to fiuorinated olefins, by reaction of fiuorinated alkyl chlorides or alkyl bromides with phenolate ions, or by replacing hydrogen atoms, halogen atoms, or other radicals, by fluorine atoms in phenol ethers. Reactions of this type are described, e.g. in Houben Weyl: Methoden der Organischen Chemie (Methods of Organic Chemistry), vol. 5/3, p. 280; and vol. 6/3, p. 119.

known conventional methods for the preparation of lightsensitive diazonium compounds. The diazonium compounds are isolated in known manner in the form of their double salts with metal halides, e.g. with zinc chloride, cadmium chloride; or tin tetrachloride. Alternatively, the compounds may be separated in the form of their tetra- '1 fiuobora'tes and hexafluophosphates, or as phosphates or sulfates, e.g. The following are examples of fiuorinated alkoxy radicals which are suitable, e.g. for the compounds of the present invention: OCF -OCF H, 1

tion is illustrated:

EXAMPLE 1 I. A photoprinting base paper customarily used for diazo- Rifindvllga. stand, .fqrhydro en.he enror"a kylnallsqxx..

- or fiuorinated alkoxy groups; and

'X is the anion of the diazonium compound;

and wherein at least one of the radicals R and R is hydrogen; and at. least one of the radicals R5, R andiig' lisafiuorinated alkoxy group.

Further, the above-identified patent deals with the use of' such compounds as light-sensitive substances-tinv diazotype materials.

SUM-M QF THE-INVENTION; v

type purposes, which was provided on one side with a precoat of finely divided silica and polyvinyl acetate, was

coated on its precoatgd side with an aqueous solution containing, per ml. of solution:

Citric acid 0.5 Sodium salt-of naphthalene-1,3,6-trisulfonic acid 3.5 Gum arabic 0.5 4-(N methyl -N benzyl. amin0)-5-methoxy-2-(difluoromethoxy)-benzerie diazonium chloride, in the form of the zinc chloride double salt (Formula3) 1.5

and then dried.

,The thus sensitized photoprinting material was image- 1; WEQ'QFQQSQQl UBdt-tl' a transparent original and developed The further steps of the synthesis are in analogy to with an aqueous solution containing, per 100 ml. of solution:

Bluish-black images appeared within a shorter time after application of the developer solution than when G. using 4 (N methyl N benzyl-amino)-2-chloro-5- Borax 2.5 (2',2,2-trifluoro-ethoxy)-benzene diazonium tetrafluobo- Soda 3.0 5 rate as the diazonium compound.

Common salt 2.0 An equally good material with substantially higher light- Thiourea 5.0 sensitivity was produced when the above-identified diazo- Sodium salt of isopropylnaphthalene sulfonic acid 0.1 nium compound of the invention was replaced by the 4- Resorcinol 0.6 piperidino 5 methoxy-2-(1,l',2,2'-tetrafluoroethoxy)- Phloroglucinol 0.6 benzene diazonium chloride, in the form of the zinc chlo- Dark red to brown images of good contrast were ob ride double salt (Formula 4), and the method described tained. above was used.

The reproduction material is distinguished by its high The coupling speed of the known zinc chloride double light-sensitivity. The full shade of the coupling color was a t of 4-piperidino2,5-diethoxy-benzene diazonium chloproduced immediately after the developer had been apride is much too low for the compound to be suitable tor plied. Substantially the same results were obtained when neutral semi-wet development. I an equivalent quantity of 4-diethyl-amino-5-ethoxy-2- The compound corresponding to Formula 2 was pre- (1',1',2,2' tetrafluoro-ethoxy)-benzene diazonium chlop red as follows: id i h f f h i hl id d bl l (Fo 4-chloro-phenol was etherified with benzyl chloride and l 7 was d ingtpad of h b ti ned dithen nitrated. The nitro group was reduced, the amine was azonium compound, the procedure being otherwise the acstylatsd, and the pl'odllct thus Obtained was again Same trated. The 4-chloro-5-nitro-2-acetylamino-phenyl-benzyl- The compound corresponding to Formula 3 was preether thlls Obtained (melting Point a methpared as follow ylated with methyl iodide in the presence of alkali. The

4-methoxyphenol was etherified with difiuoro-chloroacetyl group was split Off y means of alkali; and h methane in dioxane, in the presence of sodium hydroxide. benzyl group was split Off y means of acid- The l By nitration and reduction, the 4-methoxy-3-amino-a,a- 8 Phenol was again sthsrifisd in diOXaIle with Potassium diii i l was prepared i compound was acety. hydroxide and difluoro-chloro-methane. The resulting 4- lated, nitrated and then methylated with methyliodide and ch10") 5 nitro 2 methylamino-a.a-difluoro-anisele alkali. The acetyl group was split off by means of sulfuric (melting Point was benzylated at the nitrogen acid and the secondary base obtained was benzylated. The atom and then c d and diazotized. The diazo com- 6 nitro 4 meth y-3-(methylbenzylamino). -difluo. pound was separated in the form the tetrafluoroborate.

ro-anisole (melting point 54 C.) was then reduced and diazotized, and the diazo compound was separated in the EXAMPLE 3 form of the zinc chloride double salt.

EXAMPLE 2 whlte p pnn ba p per provided with a pre- A photoprinting base paper customarily used for diazocOat of finely dlvllled slhca and pqlyvinyl fl was type Purposes carrying a precoat of finely divided silica coated with a solution of the following composition, and and polyvinyl acetate, was coated on the precoated side then dncd: with an aqueous solution containing, per 100 ml. of 40 solution; y acld 4-0 Thiourea 5 Tartaric acid 05 y r yph h id 8 morph01inoethyl)- Sodium salt of naphthalene-1,3,6-trisulfonic acid 4.0

s i 0,02 4 y mino 2 ',1', etrafluoroethoxy)-' 4 (N methyl N p 1 benzene diazonlum chloride (in the form of the fluoromethoxy) benzene diazonium tetrafluo- 2111c chloride dQuble salt) rm a 6) 1.6 borate (Formula 2) 1.8 Water-100 ml.

and then dried.

The sensitized photoprinting material was imagewise After l q an ongmal i developmqnt with exposed under a. transparent original and developed with p images Ninth strong blue hues were obtalried an aqueous solution which contained, per 100 ml. of sowith thls h? the fun shade of the blue Images lution: was produced within a shorter time than when using either the zinc chloride double salt of 4-diethylamino-2- phl l i l 0 3 ethoxy-benzene diazonium chloride or the zinc chloride T i di it 950 double salt of 4-diethylamino-2-(2',2,2'-trifluoro-ethoxy)- Sodium benzoate 2,42 benzene diazonium chloride, in an otherwise identical Adipic acid 1.98 mixture.

Common salt 5.70 The following table lists a number of compounds ac- SOdillm salt of a i phthalene sulfonic acid 0.20 cording to the invention which have proved suitable for and had a pH-value of about 6. use in diazotype material.

TABLE Melting pt. 0! nitro comp. Formula.-." Rr-N-Ra R: R4 R. x 0.

1 CH;-N-GH; OOHF; 01 H 01-1/2 21101, as 2 CH;-N--CH:O0H: OGHF: 01 H B 4 Oil 3 CH;-'-NOH -CH; OCH: OCHF: H 014/2 Z1101: 64

4 OCH; OCFICHF, H 01-112 21101; 104

N H v v Sameasabove.- omoini o'monri H Cl-1l2 ZnOh 71 e. charm-02H. H OCFzCHFi H oil/221101, 159 7 CzHa-N-CiHs OCzHs OCFzCHFr H 01-112 znoli 1 l Melting point of the am dyestufi formed with p-nitroanili'ne.

The above examples have been presented for the purpose of illustration and should not be taken to limit the scope of the present invention. It will be apparent that the described examples are capable of many variations and modifications which are likewise to be included within the scope of the present invention as set forth in the appended claims.

What is claimed is:

1. Diazotype material comprising a supported layer of a light-sensitive composition consisting essentially of a light-sensitive diazonium compound corresponding to the general formula:

wherein R is a lower alkyl group or an aralkyl group,

R is a lower alkyl group, or

R and R together form a piperidino radical with the nitrogen atom;

R is hydrogen, a lower alkoxy group, or a lower alkoxy group having at least one fluorine atom attached to the carbon a-position;

R is halogen or a lower alkoxy group having at least one fluorine atom attached to the carbon in a-position; and

X is the anion of the diazonium compound; and wherein at least one, but only one, of R and R is said fiuon'nated alkoxy group.

2. Diazotype material according to claim 1 wherein said diazonium compound is 4-( N-methyl-N-benzylamino)-5-methoxy-5-(difluoromethoxy) benzene diazonium chloride.

3. Diazotype material according to claim 1 wherein said diazonium compound is 4-diethyl-amino5-ethoxy-Z- (l,1,2', -tetrafluoro-ethoxy) benzene diazonium chloride.

4. Diazotype material according to claim 1 wherein said diazonium compound is 4-(N-methyl-N-benzyl amino)- 2 chloro-S-(difluoromethoxy)-benzene diazonium tetrafluobora te.

5. Diazotype material according to claim 1 wherein said diazonium compound is 4-piperidin0-5-methoXy-2-(1',1', 2',2'-tetrafluoro-etlioxy)-benzene diazonium chloride.

6. Diazotype material according to claim 1 wherein said diazonium compound is 4-diethylamino-2-(1',1',2,

'-tetrafluoro-ethoxy)-benzene diazonium chloride.

7. Diazotype material according to claim 1 wherein said diazonium compound is 4-dimethylamino-2-chloro- S-difluoromethoxy-benzene diazonium chloride.

8. Diazotype material according to claim 1 wherein said diazonium compound is 4-piperidino-5-n-butoxy-2- (1',1,2,2 tetrafluoro-ethoxy)-benzene diazonium chloride.

References Cited UNITED STATES PATENTS 3,539,347 11/1970 Rauhut et a1. 96-91 R 3,615,570 10/1971 Werner et al 96-91 R 3,563,752 2/1971 Werner et al 96-91 R 3,442,650 5/1969 Hendrickx et al. 96-91 3,459,550 8/1969 Munder et al. 96-91 3,459,551 8/1969 Rauhut 96-91 3,463,639 8/ 1969 Baltazzi 260-141 X 3,493,374 2/1970 Roncken et al. 96-91 X 3,493,377 3/ 1970 Rauhut et al. 96-91 3,498,790 3/1970 Siis et a1. 260-141 X 3,510,307 5/1970 Borchers et a1. 96-91 X 3,520,692 7/1970 Knoester et al. 260-141 X 3,525,618 8/1970 Keller et al. 96-91 X CHARLES L. BOWERS, JR., Primary Examiner US. Cl. X.R.

UNITED STATES PATENT OFFICE I CERTIFICATE OF CORRECTION Patent No. 3,148,140 Dated July :4, 1913 I HANS-DIETER FROMMELD, ET. i j v It is eett fied that error appears in the above-identified patent and th t said Letters Patent are hereby corrected as shown below:

On the cover sheet insert The portion ofthe term of this patent subsequent to Nov. 11, 1987, has been disblaimed.

Signed and sealed this 21st day of Janu ary 1975.

(SEAL) Attesc; v

t MecoY M. GIBSON JR. c. MARSHALL'DANN Attesting Officer Commissioner of Patents UsCOMM-DC 60376-PB9 us. GOVERNMENT PRINTING OFFICE: 93 0 FORM PO-1050 (10-69) 

